Table 2.

Gompertz estimates of female mortality parameters and life-span summary statistics. Adult age interval is the age interval containing the mean age of first live birth; IMR (= Gompertz a) is the Gompertz estimate of instantaneous mortality rate at the first adult age interval [with its 95% confidence interval (CI)]; RoA (= Gompertz b) is the adult rate of aging estimated with Gompertz acceleration (with its 95% CI); MRDT is the mortality rate doubling time during adulthood; Oldest age reached is the age class of the oldest observed individual; Median age is the 50% survival age with its range.

Species	Adult age interval (years)	IMR (/year)	95% CI	RoA	95% CI	MRDT (no. of years)	Oldest age reached (years)		Median age	[Range]
							Estimated	Known*
Sifaka	6–7	0.0278	[0.019, 0.0410]	0.0991	[0.072, 0.136]	7.0	31–32	23–24	10	[9, 12]
Muriqui	8–9	0.00170	[0.00042, 0.00685]	0.129	[0.0722, 0.230]	5.4	40–41	26–27	25	[18, 33]
Capuchin	6–7	0.0415	[0.0150, 0.114]	0.165	[0.055, 0.494]	4.2	26–27	19–20†	11	[10, 13]
Baboon	5–6	0.0285	[0.020, 0.040]	0.123	[0.0926, 0.165]	5.6	27–28	27–28	8	[7, 9]
Blue monkey	7–8	0.00723	[0.00367, 0.0143]	0.160	[0.123, 0.209]	4.3	33–34	26–27	18	[17, 22]
Chimpanzee	14–15	0.00774	[0.0038, 0.0156]	0.0992	[0.070, 0.140]	7.0	53–54	38–39	16	[10, 25]
Gorilla	9–10	0.00028	[0.00004, 0.00214]	0.211	[0.148, 0.300]	3.3	43–44	38–39	33	[31, 35]
Human‡		0.00009	[0.00008, 0.00009]	0.0961	[0.0956, 0.0967]	7.2	100+	100+	83.5

^*Oldest individual with known date of birth.

^†Truncated at 18–19 for mortality analysis because of relatively smaller sample sizes of deaths and transitions in later age classes.

^‡Data from (16), modeled beginning at age interval 15–16 years through 99–100 years.